Polygonal inflatable sofa



FIG. 1 is a perspective view of a polygonal inflatable sofa showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawing figures depict stitching, which is not part of the claimed design. 

CLAIM The ornamental design for a polygonal inflatable sofa, as shown and described. 